Im now using WHMCS to host my clients websites, but now i have the need to have another program like WHMCS, ModernBill, Client Exec, but NOT dedicated to Hosting.

So, im looking for a beautiful CMS / CRM to manage all my clients accounts and orders, dedicated to "regular business).

So anyone knows a good managment, billing system?

Note: Need to be instaled in at my server (web based)